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Photodynamic control of citrus crop diseases

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Abstract

Citrus are economically important fruit crops to which infectious diseases like citrus canker caused by Xanthomonas citri subs. citri, citrus variegated chlorosis caused by Xylella fastidiosa, “huanglongbing” associated with the presence of Candidatus liberibacter species, anthracnose caused by Colletotrichum gloeosporioides and citrus black spot caused by Phyllosticta citricarpa, impose significant losses. Control measures involve chemical treatment of orchards but often, eradication of infected plants is unavoidable. To circumvent the environmental impacts of pesticides and the socio-economic impacts of eradication, innovative antimicrobial approaches like photodynamic inactivation are being tested. There is evidence of the susceptibility of Xanthomonas citri subs. citri and C. gloeosporioides to photodynamic damage. However, the realistic assessment of perspectives for widespread application of photodynamic inactivation in the control of citrus diseases, necessarily implies that other microorganisms are also considered. This review intends to provide a critical summary of the current state of research on photodynamic inactivation of citrus pathogens and to identify some of the current limitations to the widespread use of photodynamic treatments in citrus crops.

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Funding

This work was supported by project Rhizomis (PTDC/BIA-MIC/29736/2017) financed by Fundação para a Ciência e Tecnologia (FCT) through the Regional Operational Program of the Center (02/SAICT/2017) with FEDER funds (European Regional Development Fund, FNR and OE), and by the Research Units CESAM (UIDP/50017/2020 + UIDB/50017/2020), QOPNA (FCT UID/QUI/00062/2019), LAQV-REQUIMTE (UIDB/50006/2020), CICECO (UIDB/50011/2020 and UIDP/50011/2020) and iBiMED (UID/BIM/04501/2013). RNS acknowledges the support of project pAGE: (CENTRO-01-0145-FEDER-000003).

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JMRF, RNS and AC conceived the manuscript and defined the objectives. JF, AC and INSG provided the biological insight to the document and RNS, SG and AMSS contributed with expertise in organic chemistry. All authors revised and corrected the manuscript, and approved the final version.

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Correspondence to Ângela Cunha.

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The authors declare that they have no conflict of interest.

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Ferreira, J.R.M., Sierra-Garcia, I.N., Guieu, S. et al. Photodynamic control of citrus crop diseases. World J Microbiol Biotechnol 37, 199 (2021). https://doi.org/10.1007/s11274-021-03171-7

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  • DOI: https://doi.org/10.1007/s11274-021-03171-7

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